History of Secondary Highway 673:
Secondary Highway 673 is one of Ontario's newest provincial highways. The route connects the Shoal Lake First Nation with Highway 17 west of Kenora. The access road to Shoal Lake was first designated as a provincial highway in the early 1990s. In October 1992, a Preliminary Assumption Plan was prepared by the Ministry of Transportation of Ontario (MTO) which showed the planned assumption of the Shoal Lake Road as a new Secondary Highway. The Preliminary Assumption Plan was registered on January 12, 1993, and the route was formally designated as Secondary Highway 673 by an Order-in-Council dated February 17, 1993. Highway 673 is Ontario's highest-numbered Secondary Highway. It is also the province's most westerly Secondary Highway, since it lies immediately to the east of the Ontario-Manitoba Boundary. The highway is paved for its entire length. Unless posted otherwise, the speed limit on Highway 673 is 80 km/h (50 mph). There are no services available on this highway.